Hello, We are using lxml in several of our applications with Python 2.6 and from time to time, the application stops responding after a segmentation fault error ( [notice] child pid 10544 exit signal Segmentation fault (11)), and this kind of backtrace:
Jul 1 15:24:48 server1 httpd: *** glibc detected *** /usr/sbin/apache2: munmap_chunk(): invalid pointer: 0x00007f6468bf2c00 *** Jul 1 15:24:48 server1 httpd: ======= Backtrace: ========= Jul 1 15:24:48 server1 httpd: /lib/libc.so.6(+0x78bf6)[0x7f64767ecbf6] Jul 1 15:24:48 server1 httpd: /usr/lib/libxml2.so.2(xmlCopyError+0xd1)[0x7f6473311801] Jul 1 15:24:48 server1 httpd: /usr/lib/libxml2.so.2(__xmlRaiseError+0x30b)[0x7f6473312ecb] Jul 1 15:24:48 server1 httpd: /usr/lib/libxml2.so.2(+0x393e5)[0x7f64733173e5] Jul 1 15:24:48 server1 httpd: /usr/lib/libxml2.so.2(xmlParseDocument+0x2dc)[0x7f647332e5cc] Jul 1 15:24:48 server1 httpd: /usr/lib/libxml2.so.2(+0x50895)[0x7f647332e895] Jul 1 15:24:48 server1 httpd: /usr/lib/python2.6/dist-packages/lxml/etree.so(+0x8cbc2)[0x7f645691cbc2] Jul 1 15:24:48 server1 httpd: /usr/lib/python2.6/dist-packages/lxml/etree.so(+0x2c7cf)[0x7f64568bc7cf] After trying several versions of lxml we are still facing the issue.I've checked for the system memory consumption but everything looks fine to me, plenty of memory available, I don't see any process consuming abnormally. The issue is reproducible everytime when we execute the commande apache (apache2 reload or apache2 graceful). As workaround for this issue we execute apache2 restart. We've followed recommendations defined on these 2 links but we're still facing the issue. http://code.google.com/p/modwsgi/wiki/ApplicationIssues#Python_Simplified_GIL_State_API http://code.google.com/p/modwsgi/wiki/ApplicationIssues#Multiple_Python_Sub_Interpreters Library version: print("%-20s: %s" % ('Python', sys.version_info)) Python : (2, 6, 5, 'final', 0) print("%-20s: %s" % ('lxml.etree', etree.LXML_VERSION)) lxml.etree : (2, 3, 5, 0) print("%-20s: %s" % ('libxml used', etree.LIBXML_VERSION)) libxml used : (2, 7, 6) print("%-20s: %s" % ('libxml compiled', etree.LIBXML_COMPILED_VERSION)) libxml compiled : (2, 7, 6) print("%-20s: %s" % ('libxslt used', etree.LIBXSLT_VERSION)) libxslt used : (1, 1, 26) print("%-20s: %s" % ('libxslt compiled', etree.LIBXSLT_COMPILED_VERSION)) libxslt compiled : (1, 1, 26) Apache 2.2.14 Here is the source code that generate the issue: ID_TRANSFORM = os.environ['APPLICATION_WORKING_PATH']+'/statics/xsl/list.xsl' styledoc = lxml.etree.parse(ID_TRANSFORM) transform = lxml.etree.XSLT(styledoc) doc_root = lxml.etree.XML(str(atom)) Could you help us on this case? Regards
